Question 3
Scalars and VectorsA body on the ground is acted on by a force of 10 N at a point P as shown in the diagram above. What force is needed to stop the body from moving eastward?
- A.5 N in the direction of East
- B.5 N in the direction of West
- C.5√3 N in the direction of West
- D.10 N in the Southwest direction
Show the answer and explanation
Answer: B (5 N in the direction of West)
Explanation
The 10 N force makes 60° with East, so its eastward component is 10 cos 60° = 5 N. A 5 N force towards the West cancels it.